My opponent (Liliana) was on 3 life. I played Flame Shot on his face. His life reached 0, when the spell finished resolving, but instead of checking the state based action of him being dead (MTG rules) Decaying Ghouls Relentless Ability still triggered and due to Lilianas ability they gained 1 life and survived. This doesn't make any sense, when expecting the game to roughly work like MTG.